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Kyosho Ultima RB6 & RB6.6 Car Thread

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Old 12-21-2016, 08:46 AM   -   Wikipost
R/C Tech ForumsThread Wiki: Kyosho Ultima RB6 & RB6.6 Car Thread
Please read: This is a community-maintained wiki post containing the most important information from this thread. You may edit the Wiki once you have been a member for 90 days and have made 90 posts.
 
Last edit by: tobamiester
RB6.6 Kyosho America Product Page: http://www.kyoshoamerica.com/ULTIMA-...T_p_24505.html

RB6.6 Manual http://www.kyosho.com/jpn/support/in...A_RB6_6_IM.pdf

RB6.6 Kyosho Youtube https://www.youtube.com/watch?v=vW_sR667utY

MSRP $639 MAP $399.99

-------------------------------
New RB6.6 parts (compared exploded views, prices and links are Kyosho America):

Chassis:
  1. Main chassis - UM731 - $125.99
  2. Side guards - UM732 - $9.99

Battery Holder:
  1. Battery plate - UM733 - $8.99
  2. Battery foam - UM741 - $7.99

Rear Bulkheads:
  1. MM3 and Laydown - UM740 - $9.99
    • MM3 bulkhead
    • Laydown bulkhead
    • Swaybar Holders

3 Gear Transmission (MM and RM):
  1. Transmission - UM734 - $10.99
    • transmission cases
    • spacers
    • caps
    • plastic FR & RR suspension hangers

  2. Gear Cover - UM735 - $6.99

Laydown Transmission (3 and 4 gear possible):
  1. Transmission - UM736 - $10.99
    • transmission cases
    • spacers
    • caps
    • required extra hardware
    • pastic FR suspension hanger

  2. 40T idler - UM737 - $6.99
  3. Motor plate - UM738 - $18.99
  4. Gear cover - UM739 - $6.99

Body:
  1. Blade body - UMB05 - $27.99

Optional Parts:
  1. Lightweigt Blade body - UMB05LW - $31.99
  2. Aluminum FR suspension hanger - UMW705B - $28.99 (may be able to file UMW705 to fit)
  3. Brass FR suspension hanger - UMW725B - $30.99 (looks more different than UMW725..someone confirm?)

Typical Upgrades for new RB6.6 Buyers

UMW701 Aluminum Steering Plate (RB6)
UMW702 Aluminum Crank Arm (RB6)
UMW704-0 V2 Aluminum Rear Hub Set(0°/RB6)
UMW705B Aluminum Rear Sus. Holder (RF/RB6.6) or brass UMW725B
UMW707 Aluminum Rear Sus. Holder (RR-Mid)

Nice to have:

UMW723 Aluminum Front Sus Block (Type B/10g/RB6/RT6/SC6).


Aftermarket Parts:

Front Wing: https://www.prolineracing.com/perfor...mount-alum-rb6

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Old 01-14-2013, 04:02 PM
  #4276  
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Originally Posted by aloksatoor
FWIW, all these are not exactly issues. Its way more durable than anything else out there. I started getting breakages only in the northern cal cold weather these past few weeks. Till then it was solid. Also for 3 I have the exotek bulkhead front and rear. My opinion is run the car, get a feel for it then see if you break it then replace it. If your buying used then maybe a good idea to upgrade stuff you thinks been roughly used and for that the steering rack is a must and so are the aluminum suspension holders.
We saw all kinds of rear upper bulkheads break FAR too easily up here. And while I agree that it's no big deal to just replace if they break, but a break in a race equates to a DNF. Running a longer ballstud and lock nut on the original bulkhead pretty much fixes the issue right off the bat, possibly saving a DNF.
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Old 01-14-2013, 04:44 PM
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Originally Posted by Cpt.America
Easy, just run a longer ball stud, and put a lock nut on the bottom. Make sure you run the extra set screws in the empty holes, and you will be just fine.
+1. And I would add don't over tighten the ballstud / locknut
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Old 01-14-2013, 04:48 PM
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Originally Posted by Cpt.America
Easy, just run a longer ball stud, and put a lock nut on the bottom. Make sure you run the extra set screws in the empty holes, and you will be just fine.
ok, let me receive the kit and see what you are talking about.

thx
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Old 01-14-2013, 04:52 PM
  #4279  
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Originally Posted by Cpt.America
We saw all kinds of rear upper bulkheads break FAR too easily up here. And while I agree that it's no big deal to just replace if they break, but a break in a race equates to a DNF. Running a longer ballstud and lock nut on the original bulkhead pretty much fixes the issue right off the bat, possibly saving a DNF.
Hmm weird, I only ripped a front ball stud out the inner left front with a gnarly crash. For rear ones only things that broke were shock towers. I did put all the set screws in so maybe that helped but no nut under . I ordered a futable low pro from tower to shave some weight off, next will do some wire trimming... Love the new 80C packs though best ever yet from IP!!
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Old 01-14-2013, 04:58 PM
  #4280  
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Originally Posted by Kraig
Mike, can you post photos to show us what to look for on these revised parts? Thanks!
Sorry - been down with the flu. Yeah, I'll grab a pic of the old/new parts side by side as soon as I get a chance.
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Old 01-14-2013, 04:59 PM
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Originally Posted by teeforb
ok, let me receive the kit and see what you are talking about.

thx
Long ball stud, locknut on the bottom, and if you look closely, set screws on the extra holes.
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Old 01-14-2013, 05:24 PM
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Originally Posted by RodneyB
Long ball stud, locknut on the bottom, and if you look closely, set screws on the extra holes.
Is the foam to keep dirt out? I have seen it on some TCs but not offroad.
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Old 01-14-2013, 05:35 PM
  #4283  
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Originally Posted by aloksatoor
Is the foam to keep dirt out? I have seen it on some TCs but not offroad.
Yes it is. Wasn't it in the manual? The ZX5 and RB5 came with these too...
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Old 01-14-2013, 05:37 PM
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Originally Posted by silvalis
Yes it is. Wasn't it in the manual? The ZX5 and RB5 came with these too...
Nah not mine. The last time I saw these were in the first schumacher cougar sv I got did not install them.
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Old 01-14-2013, 05:52 PM
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Originally Posted by aloksatoor
Nah not mine. The last time I saw these were in the first schumacher cougar sv I got did not install them.
Huh. I just went through the rb6 and fs2sp manuals and didn't see when to install them.

They're listed as a "spare" though, pn UM145, item no. 39 in the rb6 manual.

oh well. I use these because I'm on a very dirty outdoor track. They last maybe 5 meets between washing and/or replacing
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Old 01-14-2013, 05:53 PM
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Originally Posted by Cpt.America
You mean, like after a running change? I have heard of the following 3

1. different chassis with fixed gearbox milling
2. beefier plastic steering rack
3. beefier shelf on rear upper bulkhead
I have a great kit then. I have none of these items and still run the plastic rear suspension holder. I run my car 2-3 a week and still have not broken anything.
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Old 01-14-2013, 05:58 PM
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Originally Posted by lbckevin
I have a great kit then. I have none of these items and still run the plastic rear suspension holder. I run my car 2-3 a week and still have not broken anything.
I've seen you drive a lot... You don't hit anything for anything to break
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Old 01-14-2013, 05:59 PM
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Originally Posted by RodneyB
Long ball stud, locknut on the bottom, and if you look closely, set screws on the extra holes.
I see it. Why do you need an extra screw there?
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Old 01-14-2013, 06:33 PM
  #4289  
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Will the same wheels that fit a B4 fit the RB6?
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Old 01-14-2013, 06:33 PM
  #4290  
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The set screw just fills in the space to make it solid and eliminate flex that could break it.
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